<?php  
	class Page {  
   		private $total;      	//总记录  
        private $pagesize;		//每页显示多少条  
        private $limit;       	//limit  
        private $page;        	//当前页码  
        private $pagenum;      	//总页码  
        private $url;           //地址  
        private $bothnum;      	//两边保持数字分页的量  
        
        //构造方法初始化  
        public function __construct($_total, $_pagesize) {  
       		$this->total = $_total ? $_total : 1;  
        	$this->pagesize = $_pagesize;  
            $this->pagenum = ceil($this->total / $this->pagesize);  
            $this->page = $this->setPage();  
            $this->limit = "LIMIT ".($this->page-1)*$this->pagesize.",$this->pagesize";  
            $this->url = $this->setUrl();  
            $this->bothnum = 2;  
        }  
        
        //拦截器  
        public function __get($_key) {  
           	return $this->$_key;  
        }  
        
        //获取当前页码  
       	private function setPage() {  
       		if (!empty($_GET['page'])) {  
            	if ($_GET['page'] > 0) {  
                	if ($_GET['page'] > $this->pagenum) {  
                    	return $this->pagenum;  
                  	} else {  
                        return $_GET['page'];  
                    }  
               	} else {  
                	return 1;  
               	}  
          	} else {  
                    return 1;  
          	}  
     	}   
        
        //获取地址  
        private function setUrl() {  
        	$_url = $_SERVER["REQUEST_URI"];  
           	$_par = parse_url($_url);  
            if (isset($_par['query'])) {  
            	parse_str($_par['query'],$_query);  
            	unset($_query['page']);  
             	$_url = $_par['path'].'?'.http_build_query($_query);  
             }  
             return $_url;  
          }     //数字目录  
          private function pageList() {  
             for ($i=$this->bothnum;$i>=1;$i--) {  
                $_page = $this->page-$i;  
                if ($_page < 1) continue;  
                    $_pagelist .= ' <a href="'.$this->url.'&page='.$_page.'">'.$_page.'</a> ';  
             }  
             $_pagelist .= ' <span class="me">'.$this->page.'</span> ';  
             for ($i=1;$i<=$this->bothnum;$i++) {  
                $_page = $this->page+$i;  
                    if ($_page > $this->pagenum) break;  
                    $_pagelist .= ' <a href="'.$this->url.'&page='.$_page.'">'.$_page.'</a> ';  
             }  
             return $_pagelist;  
          }  
        
          //首页  http://ini.iteye.com/  
          private function first() {  
             if ($this->page > $this->bothnum+1) {  
                    return ' <a href="'.$this->url.'">1</a> ...';  
             }  
          }  
        
          //上一页  
          private function prev() {  
             if ($this->page == 1) {  
                    return '<span class="disabled">上一页</span>';  
             }  
             return ' <a href="'.$this->url.'&page='.($this->page-1).'">上一页</a> ';  
          }  
        
          //下一页  
          private function next() {  
             if ($this->page == $this->pagenum) {  
                    return '<span class="disabled">下一页</span>';  
             }  
             return ' <a href="'.$this->url.'&page='.($this->page+1).'">下一页</a> ';  
          }  
        
          //尾页  
          private function last() {  
             if ($this->pagenum - $this->page > $this->bothnum) {  
                    return ' ...<a href="'.$this->url.'&page='.$this->pagenum.'">'.$this->pagenum.'</a> ';  
             }  
          }  
        
          //分页信息  
         public function showpage() {  
             $_page .= $this->first();  
             $_page .= $this->pageList();  
             $_page .= $this->last();  
             $_page .= $this->prev();  
             $_page .= $this->next();  
             return $_page;  
    	}  
	}   